Never heart of SAP DB. Is it related to SAP itself? Cheers, Ronald
-----Original Message----- From: Jonathan Bartlett [mailto:[EMAIL PROTECTED]] Sent: maandag 18 november 2002 15:11 To: [EMAIL PROTECTED] Subject: Re: Mysql or Postgresql Before I start, let me first say that you have left out two very good open-source databases from consideration - SAP DB and Interbase. You might look into both of these. Anyway, as to your specific question: MySQL does not support the relational idea very well. People do not use relational databases because they are fast. While it is theoretically possible to make relational databases extremely fast, it is usually not done. The reason people use relational databases is because the relational idea makes managing data, changing data schemas, and multiple applications very well. For example, PostgreSQL supports views, MySQL does not. This is very important if your database is going to be used by more than one application, or has a chance of changing in the future. PostgreSQL supports arbitrary types defined by the user, MySQL does not. PostgreSQL support _serializable_ transactions (the highest isolation level). I don't believe MySQL supports that level of transactions. PostgreSQL allows you to write functions in many languages. MySQL does not. PostgreSQL allows unions, and even unions and group by's in views. MySQL does not. If your data is important, I would go with PostgreSQL, simply because it has much better data management options. For many things it is faster, too. Jon On Mon, 18 Nov 2002, Shiva Haddad wrote: > I want to have client , server database in redhat for a IP Telephone system product, > it must be multi-user & ... > which one is better , Mysql or postgresql ? > -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list
